The NFL and the union agreed in principle to HGH testing when a new 10-year labor agreement was reached in August 2011. But protocols must be approved by both sides and the players have questioned the science in the testing procedures, stalling implementation.

Speaking at the scouting combine Thursday, Birch says the NFL has full confidence in the test and "should have been a year into this by now." He calls the delays "a disservice to all of us."

On Tuesday, the union said in a conference call it favors HGH testing, but only with a strong appeal process. Otherwise, NFLPA spokesman George Atallah said, "it's just a nonstarter."